RT Web Page SR Electronic(1) ID 15305448 A1 A. Illingworth T1 Welding YR 2015 FD 2015-12-22 NO testing and inspection of, PB Begell House Inc. PP New York DO 10.1615/hedhme.a.000448 RD 2025-05-06 UL https://hedhme.com/content_map/?article_id=448&link_id=15305 WT HEDH Multimedia - Heat Exchanger Design Handbook, Multimedia Edition WP 2015-12-22